What is the unpardonable sin?

But when the Pharisees heard it, they said, “This man does not cast out demons, except by Beelzebul, the prince of the demons.” Knowing their thoughts, Jesus said to them, “Every kingdom divided against itself is brought to desolation, and every city or house divided against itself will not stand. If Satan casts out Satan, he is divided against himself. How then will his kingdom stand? If I by Beelzebul cast out demons, by whom do your children cast them out? Therefore they will be your judges. But if I by the Spirit of God cast out demons, then the Kingdom of God has come upon you.

The scribes who came down from Jerusalem said, “He has Beelzebul,” and, “By the prince of the demons he casts out the demons.” He summoned them, and said to them in parables, “How can Satan cast out Satan?

But if I by the Spirit of God cast out demons, then the Kingdom of God has come upon you.

Therefore I tell you, every sin and blasphemy will be forgiven men, but the blasphemy against the Spirit will not be forgiven men. Whoever speaks a word against the Son of Man, it will be forgiven him; but whoever speaks against the Holy Spirit, it will not be forgiven him, neither in this age, nor in that which is to come.

Most certainly I tell you, all sins of the descendants of man will be forgiven, including their blasphemies with which they may blaspheme; but whoever may blaspheme against the Holy Spirit never has forgiveness, but is subject to eternal condemnation.” —because they said, “He has an unclean spirit.”

For concerning those who were once enlightened and tasted of the heavenly gift, and were made partakers of the Holy Spirit, and tasted the good word of God, and the powers of the age to come, and then fell away, it is impossible to renew them again to repentance; seeing they crucify the Son of God for themselves again, and put him to open shame.

For if we sin willfully after we have received the knowledge of the truth, there remains no more a sacrifice for sins, but a certain fearful expectation of judgment, and a fierceness of fire which will devour the adversaries. A man who disregards Moses’ law dies without compassion on the word of two or three witnesses. How much worse punishment, do you think, will he be judged worthy of, who has trodden under foot the Son of God, and has counted the blood of the covenant with which he was sanctified an unholy thing, and has insulted the Spirit of grace?

If anyone sees his brother sinning a sin not leading to death, he shall ask, and God will give him life for those who sin not leading to death. There is a sin leading to death. I don’t say that he should make a request concerning this. All unrighteousness is sin, and there is a sin not leading to death.

“You stiff-necked and uncircumcised in heart and ears, you always resist the Holy Spirit! As your fathers did, so you do.

When he has come, he will convict the world about sin, about righteousness, and about judgment; about sin, because they don’t believe in me; about righteousness, because I am going to my Father, and you won’t see me any more; about judgment, because the prince of this world has been judged.

But, beloved, we are persuaded of better things for you, and things that accompany salvation, even though we speak like this. For God is not unrighteous, so as to forget your work and the labor of love which you showed toward his name, in that you served the saints, and still do serve them. We desire that each one of you may show the same diligence to the fullness of hope even to the end, that you won’t be sluggish, but imitators of those who through faith and patience inherited the promises.

These things I have written to you who believe in the name of the Son of God, that you may know that you have eternal life, and that you may continue to believe in the name of the Son of God.

When he has come, he will convict the world about sin, about righteousness, and about judgment;

If anyone sees his brother sinning a sin not leading to death, he shall ask, and God will give him life for those who sin not leading to death. There is a sin leading to death. I don’t say that he should make a request concerning this.